Skar Audio VXF-15 D4

15″ subwoofer · dual 4 Ω · 1,500 W RMS

Fs 35.4 HzQts 0.39Vas 1.68 ft³Xmax 1.18″

Recommended box

For a sedan, one sub, 1,500 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume1.32 ft³ (37.5 L)
Qtc0.59
Fc53 Hz
F3 (−3 dB, no cabin gain)68 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 12 3/16″
Open sealed box in designer

Ported

Net volume2.30 ft³ (65 L)
Tuning (Fb)34 Hz
Portslot 3 1/8 × 16 5/16″, 45 13/16″ long
Port velocity at 1,500 W63 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 15 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.4 Hz
Qts0.39
Qes0.43
Qms4.78
Vas1.68 ft³
Re (one coil)≈ 3.4 Ω
Sd120.8 in²
Xmax1.18″
Vd142.7 in³ calc.
Mms365 g calc.
BL25.3 T·m calc.
EBP82 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.9 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power1,500 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 9 3/4″magnet Ø8 9/16″
Cutout diameter13 7/8″
Mounting depth9 3/4″
Magnet diameter8 9/16″

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other Skar Audio 15″ models